Attribute 'init_namespace'

The effect of this pragma is that a variable of the type ‎STRING‎ or ‎WSTRING‎, which is declared in a library function block with this pragma, is initialized when used in the project with the current namespace of the library.

Syntax

‎{attribute 'init_namespace'} ‎

Insertion position: the line above the line with the declaration of the variables in a library function block.

Example

The function block “POU” is provided with the necessary attributes:

FUNCTION_BLOCK POU
VAR_OUTPUT
 {attribute 'init_namespace'}
 myStr: STRING;
END_VAR

An instance ‎fb‎ of the function block POU is defined within the main program PLC_PRG:

PROGRAM PLC_PRG
VAR
 fb:POU;
 newString: STRING;
END_VAR
 newString := fb.myStr;

The variable ‎myStr‎ is initialized with the current namespace, for example ‎MyLib‎. This value is assigned to ‎newString‎ in the main program.